<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2020/10/12
  Time: 14:49
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<%
    /*application.setAttribute("A","aaa");
    application.setAttribute("B","bbb");
    application.removeAttribute("A");
    application.setAttribute("B","ccc");*/
    session.setAttribute("A","aaa");
    session.setAttribute("B","bbb");
    session.removeAttribute("A");
    session.setAttribute("B","ccc");
%>
</body>
</html>
